Yeah, I tease the people I'm close to almost without mercy. Though with some qualifiers - not all of the time and hopefully not predictably... I won't tease about the same thing over and over again.
I like to see the humor in almost everything if I can. Also, this was the dynamic in my family. Very teasey! I only do it with people that I feel know I care. It's never supposed to be cruel though sometimes I have to be careful not to go too far. I feel horrible when I've misjudged where the line is.
Hmm, I can't easily keep it in either!